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WhoIsConnectedSniffer vs MyLanViewer Network/IP Scanner: catalog facts
WhoIsConnectedSniffer	MyLanViewer Network/IP Scanner
Free Freeware from NirSoft; it may not be sold or bundled with commercial products.	Paid Commercial software with a registration page; check the site for current terms.
Windows	Windows
Passive discovery that sends no packets to other devices Shows operating system, description and IPv6 address that scanners may miss	Detailed per-device information including MAC and NIC vendor Alerts when new devices join the network
Requires the Npcap or Network Monitor capture driver Only detects devices that send packets the computer receives, and not on other subnets	Windows only Requires registration for full use
Downloadable app	Downloadable app
Closed source	Closed source
License: Freeware	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.